Trisazo copper complexes



Patented Sept. 16, 1947 2,427,539 TRISAZO COPPER COlWPLEXES Walter Wehrli, Basel, Switzerland, assignor to Sandoz Ltd., Fribourg, Switzerland, a Swiss omp any No Drawing. Application July 6, 1942, Serial No.

449,952. In Switzerland July 14, 1941 8 Claims.

wherein X and Y stand for a substituent selected from the group consisting of hydroxy, alkoxy, acyloxy and halogen, R stands for a radical selected from the group consisting of benzene and naphthalene, and wherein Y stands in o-position to the azo group 1, whereby the disazo dyestuffs must contain at least one sulphonic acid group and may contain complex linked metal and other substituents, with suitable azo components which can also contain azo groups, and treating the polyazo dyestuffs thus obtained, insofar as they do not contain any complex linked metal, in substance or on the fibre with metallizing compounds.

In case the polyazo "dyestuffs prepared according to the present invention contain diazotizable amino groups, they can be-before Or after treatment with metallizing compounds-diamtized in substance or on the fibre and coupled with suitable azo components.

The complex metal compounds of the polyazo dyestuffs prepared as herein above defined may further contain groups able to link metals; in this case they can be treated with metallizing compounds in substance or when already dyed on a fibre.

The disazo dyestuffs used in the present process as starting products can be prepared in different ways. For instance one can combine first an o-hydroxy or an o-alkoxy or an o-halogen diazo naphthalene compound with a l-hydroxy or a 1-alkoxy-3-aminobenzene derivative containing a free 6-position, further diazotizing and coupling with a suitable middle component of the benzene or naphthalene series that couples in para-position to the amino group. Further the starting disazo dyestuffs can be obtained by diazotizing for instance l-amino-Z-hydroxy--acylaminobenzene or 1-amino-2-alkoxy-4-acylaminoben- Zene or 1-amino-2-halogen-4-nitrobenzene or 1- amino-Z-halogen-4-acylaminobenzene, l-amino- Z-hydroxy--nitrobenzene or l-amino-Z-alkoxyl-nitrobenzene and coupling these diazo compounds with a hydroxynaphthalene that can contain sulpho or carboxy groups and other substituents in such a manner, that the coupling takes place in o-position to the hydroxy group, reduction of the nitroor saponification of the acylamino group, further the diazotation and coupling with a suitable middle component that couples in paraposition to the amino group.

In case that instead of the disazo dyestuffs their metallized derivatives are used as starting products, the treatment with the metallizing agents can be carried out already with the monoazo dyestuffs used for their preparation or with the ready prepared disazo dyestufis. Under the expression metallizing agents I understand substances that, when applied by usual methods on azo dyestuffs that contain groups able to link metals, transform the dyestufis into metal complex compounds. Such metallizing agents are for example compounds of copper, nickel, cobalt, chromium, iron, vanadium, and the like which canbe used as such or in mixture or as free metals.

As azo components that can be used for the coupling with the above cited diazotized disazo dyestuffs or their metal compounds can be cited the suitable coupling-able aliphatic, isocyclic or heterocyclic compounds and also the couplingable azo dyestuffs which can contain complex linked metals.

The coupling is preferably carried out in presence of acid binding agents such as sodium carbonate, sodium acetate, chalk, calcium hydroxide, pyridine, pyridine bases and the like.

The new dyestufis obtained according to the present invention dye cotton, linen and artificial fibres from regenerated cellulose generally in blue, grey, green and olive shades. Generally they possess an excellent affinity and give dyeings with good wet-fastness and excellent fastness to light. Some of them are very suitabl for dyeing leather.

One object of the present invention is the process for the preparation of metallized substantive dyestuffs, consisting in coupling diazotized disazo dyestuffs of the herein above disclosed configuration with suitable coupling components and treating the polyazo dyestuffs thus obtained with metallizing agents.

Another object of the present invention is the process for the manufacture of metallized substantive dyestuffs consisting in coupling diazotized metallized disazo dyestufis of the herein above defined configuration with suitable coupling comwherein X and Y stand for a substituent selected from the group consisting of hydroxy, alkoxy, acyloxy and halogen, R stands for a radical selected from the group consisting of benzene and naphthalene, R1 stands for a suitable couplingable aliphatic, isocyclic or heterooyclic compound or an azo dyestufi capable of coupling which may contain complex linked metals, and wherein Y stands in o-position to the azo group 1 and the azo-group 2 in p-position to azo group 3, which dyestuffs contain at least one sulphonic acid group and dye cellulose fibres and leather into fast blue, grey, green and olive shades.

The following examples, without being limitative, illustrate the present invention, the parts being by weight:

Example 1 63.7 parts of the disazo dyestuif of the formula on on some N=N-C N=N- NHl SOaNa are diazotized with 6.9 parts of sodium nitrite and 25 parts of hydrochloric acid and coupled in presence of 50'parts of sodium bicarbonate and 50 parts of technical pyridine base mixture with 31.5 parts of 2-phenylamine-5-hydroxynaphthalene-7-su1phonic acid. The dyestufi thus obtained is then salted out and filtered. The precipitate is then dissolved in water and transformed into its copper derivative by treating it at elevated temperature with 25 parts of copper sulphate in presence of sodium acetate. After salting out, filtration and drying, the new dyestufi is a bronzing powder, soluble in water and possessing an excellent affinity. It dyes cotton and artificial silk from regenerated cellulose in brilliant blue shades which are very fast to light and to washing.

The transformation of the polyazo dyestuff into its copper-complex compound can, with the same success, be carried out by treating it with copper sulphate in presence of ammonia. 7

By using instead of the disazo dyestufi cited above similar disazo dyestufis for the preparation of which, instead of 1-a.minonaphthalene-6-sulphonic acid, l-aminonaphthalene 7 sulphonic acid or the technical mixture of l-aminonaphthalene-G-sulphonic acid and l-aminonaphthalene-7-sulphonic acid is used and working in the manner described above, dyestuffs with similar properties will be obtained.

Similar dyestufis will also be' obtained when, instead of 2-phenylamino-5-hydroxynaphthalene-7-sulphom'c acid, equivalent parts of 2(4'- methylphenyl) -amino -hydroxynaphthalene- 4 7-sulphonic acid or 2(3'-carboxyphenyl) -amino- 5-hydroxynaphthalene-7-sulphonic acid are used as azo components.

Example 2 69.9 parts of the copper derivative of the disazo dyestufi used in Example 1 as starting product are diazotized with 6.9 parts of sodium nitrite and 25 parts of hydrochloric acid and coupled in presence of 20 parts of sodium carbonate and parts of pyridine with 31.5 parts of 2-phenylamino-5-hydroxynaphthalene-7-sulphonic acid. The dyestuff isolated in the usual way is practically identical with the dyestufi the preparation of which is described in Example 1.

Example 3 S O3Na S OaNB and working in the manner described in Example, 1, a dyestufi will be obtained that gives fuller blue shades and possessing very good aifinity and. similar fastness properties.

Example 4 By replacing in Example 1 2-phenylamino5-- hydroxynaphthalene-7-sulphonic acid by 36.1. parts of 1-hydroxy 8-acetylaminonaphthalene- NHz.

3:6-disulphonic acid and working in the manner described there, a copper-containing dyestuff dyeing leather in brilliant blue shades Will be obtained.

Example5 By using, instead of Z-phe'nylamino-fi-hydroxynaphthalene-7-sulphonic acid, 23.9 parts of 2-amino-5-hydroxynaphthalene-7-sulphonic acid as azo compound, a dyestuff'dyeing cotton in redder brilliant blue shades of excellent washing and light fastness and excellent affinity will be obtained.

The dyestuif thus obtained contains a diazotizable amino group. It can'before or after treatment with copper-bediaz'citized in substance or on the fibre and coupledwith suitable azo components.

Example 6 69.9 parts of the copper compound of the disazo-dyestuff used as starting product in Example 1, are diazotized with 6.9 parts of sodium nitrite and 25 parts of hydrochloric acid and coupled with 44.7 parts of a monoazo dyestuiT of the formula in presence of sodium bicarbonate and technical pyridine bases. Thedyestuff-isolated in the usual way dyes-cotton in greenishgrey-blue shades; the fastness of which can be increasedby subsequent treatment with metal salts, especially withcopper or chromium salts.

The following tables show the schemata for the consisting of hydrogen and alkyl, and Y stands preparation of further dyestufis. for an SOsI-I group in one of the positions y and Dyeing of the copper- No. Disazo dyestufi Azo component containing dyestufi on .I cotton 1. $1 1 (311 2-phcnylami110-5-hy(1roxynaphthalene-T-sulphonicacid Blue.

SOaH- N=N N=N NHZ S 0 3H 2. ()H (HI 2-benzoylamino-fi-hydroxynaphthalene-7-su1phonic acid Grey-blue.

sosn- N=N@-N=N NH2 S 0 3H 3. id 2-benzoylamino-8-hydroxynaphtha1ene-6-sulphonic acid. Do, 4. (\)H ([)H (3H3 2-phenylamino-5-hydroxynaphthalene-7-su1phonic acid Blue.

so311- N: ON=NGNH2 I CH3 5. (IE (EH 0 C H3 2-pheny1a1nino-5-l1ydroxynaphthalene-7 -sn1phonic acid" Do.

SOaH- N=NON=N N112 I C H3 6. (DH (|)H ()H Blue-grey.

SO3H- N=N N=N -NH2 SOSH NHz SOzH N==NC 7. (I) H 11 (H1 Grey.

SOsH- N=N' -N:N N112 on 1TI=N-8 I S0311 SO3H-@SO3H What I claim is: 2;, coupling the resultant diazodisazo dyestuff l. A process for the manufacture of a complex with a component of the formula copper compound of a substantive polyazo dyestuff, which comprises the steps of diazotizing a disazo dyestuff oi the formula OH OH on Ho3smazo-ONHz wherein one Z is a member selected from the HOaS Z 9 group consisting of -NH2, -NH-aryl and -NH-acyl and the other Z is hydrogen; and Y treating the polyazo dyestuff thus obtained with a copper-yielding agent.

2. A process for the manufacture of a complex wherein X is a member selected from the group pp compound of a Substantive D Y dyestuff, comprising the steps of diazotizing the disazo dyestufi of the formula 9 (')H ?H s 0311- awazo-8NHZ SOaH coupling it with Z-phenylamino-5-hydroxynaph thalene-7-sulphonic acid, and treating the polyazo dyestuff thus obtained With copper sulphate in presence of sodium acetate at an elevated temperature.

, 3. A process for the manufacture of a complex copper compound of a substantive polyazo dyestufi, comprising the steps of diazotizing the disazo dyestuif of the formula on on SOsH- azo 1120- I NH:

coupling it with 2-pheny1amino-5-hydroxynaphthalene-7-sulphonic acid, and treating the polyazo dyestuff thus obtained with copper sulphate in presence of sodium acetate at an elevated temperature.

4. A process for the manufacture of a. complex copper compound of a substantive polyazo dyestufi, comprising the steps of diazotizing the disazo dyestuff of the formula OH OH azo-8NH;

coupling it with 2-benzoylamino-8-hydroxynaphthalene-S-sulphonicacid, and treating the polyazo dyestuff thus obtained with copper sulphate in presence of sodium acetate at an elevated temperature.

5. A complex copper compound of a substantive olyazo dyestuff of the formula H 03S 1120- O H 8 wherein X is a member selected from the group consisting of hydrogen and alkyl, Y stands for an SO3H group in one of the positions y and y, one Z is a member selected from the group consisting of -NH2, NH-aryl and NH-aoy1, and the other Z is hydrogen.

6. The complex copper compound of the poly azo dyestuff of the formula SOQH 7. The complex copper compound of the polyazo dyestuff of the formula on on SOaH -azo R 3Z0 310-- H036 NH cam SOsH 8. The complex copper compound of the polyazo dyestuif of the formula H038 azo 3 az0 az NHCOCLHS HOaS WALTER WEHLRLI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

